Specifications

Chapter 12 147
Connecting the Instrument to a Handler with the Handler Interface
Electrical Characteristics
12. Connecting the
Instrument with a Handler
(Using the Handler Interface)
Electrical Characteristics
Output signals
Each output signal is generated as open collector output of a photocoupler and obtained as
voltage output applied to an external pull-up resistor connected to the 4287A (Table 12-4).
Table 12-3 shows the electrical characteristics of the output signals. A typical circuit
diagram for the handler output signals (an example of pull-up resistor connections) is
shown in Figure 12-3.
The 4287A can also contain internal pull-up resistors. For more information, contact your
distributor or the Agilent Technologies sales office nearest your site.
Table 12-3 Electrical characteristics of handler interface output signals
Output voltage [V]
Maximum current [mA]
Low High
0 to 0.5 Pull-up voltage (5 to 24) 6
Table 12-4 Guidelines for pull-up resistance values
Pull-up
voltage [V]
Resistance
value [W]
Typical resistors
Resistance
value [W]
Agilent Part No.
5 1.7k (5 V / 3 mA) 1.78k 0757-0278
9 3.0k (9 V / 3 mA) 3.16k 0757-0279
12 4.0k (12 V / 3 mA) 4.22k 0698-3154
15 5.0k (15 V / 3 mA) 5.11k 0757-0438
24 8.0k (24 V / 3 mA) 8.25k 0757-0441